Photo Thermal Conversion Technology

Due to the tubular construction of VM tubes, they are strong enough to carry the weight of an average person and the impact of golf size hail storms.


A solar collector absorbs solar radiation and converts it into heat (photo-thermal conversion). The high efficiency solar collector implies maximum absorption of incident solar radiation with a minimum thermal and optical loss. Selective coating characteristics of the absorber and the vacuum insulation are the most important parts of an advanced collector. A selective surface has high absorption (low reflection) for the solar spectrum and low emissivity for the infrared heat radiation. The selective coating used in the collector consists of a thin, precise layer of an amorphous semiconductor plated on to a metal substratum; this has a low emission for long-wave radiation.

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